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4 October 2023 Nonreciprocal fiber-optic amplifier enabled by encircling-an-EP emulation and gain saturation nonlinearity
Yu Sung Choi, Seunghan Shin, Sung Ill Moon, Mi Ji Kim, Jae Woong Yoon
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC1264717 (2023) https://doi.org/10.1117/12.2676618
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Optical nonreciprocity is required in many optical systems for signal stabilization, laser protection, non-destructive probing. Here, we experimentally demonstrate a nonreciprocal fiber-optic amplifier enabled by encircling-an-exceptional-point emulation and gain-saturation nonlinearity. We realize the proposed system by combining optical attenuators, Erbium-doped fiber amplifiers (EDFA), and 2x2 couplers. We obtain remarkably high nonreciprocal transmission ratio > 20 dB persisting over the entire gain band from 1,530 to 1,560 nm at moderate input power conditions from 0.1 to 1 mW.
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Yu Sung Choi, Seunghan Shin, Sung Ill Moon, Mi Ji Kim, and Jae Woong Yoon "Nonreciprocal fiber-optic amplifier enabled by encircling-an-EP emulation and gain saturation nonlinearity", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC1264717 (4 October 2023); https://doi.org/10.1117/12.2676618
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KEYWORDS
Fiber optics
Nonlinear optics
Optical transmission
Integrated optics
Crystals
Magnetooptics
Optical amplifiers
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